projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e8ddcbe PA |
1 | /* -*- linux-c -*- ------------------------------------------------------- * |
| 2 | * | |
| 3 | * Copyright (C) 1991, 1992 Linus Torvalds | |
| 4 | * Copyright 2007 rPath, Inc. - All Rights Reserved | |
| 5 | * | |
| 6 | * This file is part of the Linux kernel, and is made available under | |
| 7 | * the terms of the GNU General Public License version 2. | |
| 8 | * | |
| 9 | * ----------------------------------------------------------------------- */ | |
| 10 | ||
| 11 | /* | |
| 5e8ddcbe PA |
12 | * Header file for the real-mode video probing code |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef BOOT_VIDEO_H | |
| 16 | #define BOOT_VIDEO_H | |
| 17 | ||
| 18 | #include <linux/types.h> | |
| 19 | ||
| 2495fbf7 PA |
20 | /* |
| 21 | * This code uses an extended set of video mode numbers. These include: | |
| 5e8ddcbe PA |
22 | * Aliases for standard modes |
| 23 | * NORMAL_VGA (-1) | |
| 24 | * EXTENDED_VGA (-2) | |
| 25 | * ASK_VGA (-3) | |
| 26 | * Video modes numbered by menu position -- NOT RECOMMENDED because of lack | |
| 27 | * of compatibility when extending the table. These are between 0x00 and 0xff. | |
| 28 | */ | |
| 29 | #define VIDEO_FIRST_MENU 0x0000 | |
| 30 | ||
| 31 | /* Standard BIOS video modes (BIOS number + 0x0100) */ | |
| 32 | #define VIDEO_FIRST_BIOS 0x0100 | |
| 33 | ||
| 34 | /* VESA BIOS video modes (VESA number + 0x0200) */ | |
| 35 | #define VIDEO_FIRST_VESA 0x0200 | |
| 36 | ||
| 37 | /* Video7 special modes (BIOS number + 0x0900) */ | |
| 38 | #define VIDEO_FIRST_V7 0x0900 | |
| 39 | ||
| 40 | /* Special video modes */ | |
| 41 | #define VIDEO_FIRST_SPECIAL 0x0f00 | |
| 42 | #define VIDEO_80x25 0x0f00 | |
| 43 | #define VIDEO_8POINT 0x0f01 | |
| 44 | #define VIDEO_80x43 0x0f02 | |
| 45 | #define VIDEO_80x28 0x0f03 | |
| 46 | #define VIDEO_CURRENT_MODE 0x0f04 | |
| 47 | #define VIDEO_80x30 0x0f05 | |
| 48 | #define VIDEO_80x34 0x0f06 | |
| 49 | #define VIDEO_80x60 0x0f07 | |
| 50 | #define VIDEO_GFX_HACK 0x0f08 | |
| 51 | #define VIDEO_LAST_SPECIAL 0x0f09 | |
| 52 | ||
| 53 | /* Video modes given by resolution */ | |
| 54 | #define VIDEO_FIRST_RESOLUTION 0x1000 | |
| 55 | ||
| 56 | /* The "recalculate timings" flag */ | |
| 57 | #define VIDEO_RECALC 0x8000 | |
| 58 | ||
| 5e8ddcbe PA |
59 | void store_screen(void); |
| 60 | #define DO_STORE() store_screen() | |
| 5e8ddcbe PA |
61 | |
| 62 | /* | |
| 63 | * Mode table structures | |
| 64 | */ | |
| 65 | ||
| 66 | struct mode_info { | |
| 67 | u16 mode; /* Mode number (vga= style) */ | |
| 1cac5004 PA |
68 | u16 x, y; /* Width, height */ |
| 69 | u16 depth; /* Bits per pixel, 0 for text mode */ | |
| 5e8ddcbe PA |
70 | }; |
| 71 | ||
| 72 | struct card_info { | |
| 73 | const char *card_name; | |
| 74 | int (*set_mode)(struct mode_info *mode); | |
| 75 | int (*probe)(void); | |
| 76 | struct mode_info *modes; | |
| 77 | int nmodes; /* Number of probed modes so far */ | |
| 78 | int unsafe; /* Probing is unsafe, only do after "scan" */ | |
| 79 | u16 xmode_first; /* Unprobed modes to try to call anyway */ | |
| 80 | u16 xmode_n; /* Size of unprobed mode range */ | |
| 81 | }; | |
| 82 | ||
| 9b3965f7 | 83 | #define __videocard struct card_info __attribute__((used,section(".videocards"))) |
| 5e8ddcbe PA |
84 | extern struct card_info video_cards[], video_cards_end[]; |
| 85 | ||
| 86 | int mode_defined(u16 mode); /* video.c */ | |
| 87 | ||
| 88 | /* Basic video information */ | |
| 89 | #define ADAPTER_CGA 0 /* CGA/MDA/HGC */ | |
| 90 | #define ADAPTER_EGA 1 | |
| 91 | #define ADAPTER_VGA 2 | |
| 92 | ||
| 93 | extern int adapter; | |
| 5e8ddcbe PA |
94 | extern int force_x, force_y; /* Don't query the BIOS for cols/rows */ |
| 95 | extern int do_restore; /* Restore screen contents */ | |
| 96 | extern int graphic_mode; /* Graphics mode with linear frame buffer */ | |
| 97 | ||
| 5e8ddcbe PA |
98 | /* Accessing VGA indexed registers */ |
| 99 | static inline u8 in_idx(u16 port, u8 index) | |
| 100 | { | |
| 101 | outb(index, port); | |
| 102 | return inb(port+1); | |
| 103 | } | |
| 104 | ||
| 105 | static inline void out_idx(u8 v, u16 port, u8 index) | |
| 106 | { | |
| 107 | outw(index+(v << 8), port); | |
| 108 | } | |
| 109 | ||
| 110 | /* Writes a value to an indexed port and then reads the port again */ | |
| 111 | static inline u8 tst_idx(u8 v, u16 port, u8 index) | |
| 112 | { | |
| 113 | out_idx(port, index, v); | |
| 114 | return in_idx(port, index); | |
| 115 | } | |
| 116 | ||
| 117 | /* Get the I/O port of the VGA CRTC */ | |
| 118 | u16 vga_crtc(void); /* video-vga.c */ | |
| 119 | ||
| 120 | #endif /* BOOT_VIDEO_H */ |